Improvement in coal stoves



' 2 Sheets-.Sheet 1. B. W. DUNKLEE.

H otEAr Furnace.

Patented Jan. 1, 1867.

Wallin/aww: 1 27a/emr: 55% @6W @f NAFETERS. FNOTO-UnomER, WASHINGTON, D C.

2 Sheets-Sheet 2.

N. 60,840. Patented Jan. 1, 1867.

-T s 'I aj f I' c 2 I I g l I i z i ma; MVM" yad my MPEERS, PHOTO-LITHOGRAPMER. WASHINGTON. D. C.

@uiten 1ste/siguien ffice.

IMPROVEMENT IN GOAL STOVES.

@its slgrnle'teerreh tu in that hiatus man unt mating pct nf tigt same.

To ALL wHoM 1T MAY concerns:

Be it known that I,.B. WELLS DUNKLEE, of Boston, in the county of Suiiolk, State of Massachusetts, have invented a newr and useful Improvement in Air-Heating Furnaces; and I do hereby declare that the following to be a full, clear, and exact description thereof, reference being had to the accompanyingdrawings, making part of this s'peCiGatioD, and in which- Figure 1 is atop view.

Figure 2 a` front elevation.

Figure 3, aside elevation.

Figures 4 and 5, vertical sections.

Figurc a horizontal section of an air-heating furnace constructed in accordance with my invention.

The objects which I accomplish by this invention being, first, to economizel theamount of fuel consumed; second, to simplify the construction andregulation of the furnace; third, to intensify the current of lair passing through the air-tubes; fourth, in the arrangement of the air-tubes surrounding the respot. In the drawings- A. denotes the tire-pot; B the body of the furnace; C C, dto., all the body air-tubes; D D, &c., the cold-air extension of the said tubes; E the direct smoke outlet, F the indirect or downward smoke outlet, G the cut-off draught and clean-,out door, H the upright connecting-pipe. The body air-tubes O are extended below the body of the furnace a suicient distance to meet the lower strata of cold air admitted into the lower part of the chamber, in whichvthe furnace is situated, for the purpose of taking up this cold air in separate columns and passing it upward through that portion of the air-tube situated within the body of the furnace, thereby securing :1. strong current of air through them, and consequently imparting a greater amount of heat to the airiwithout liability of injary to the tubes; thus making the current of air more sure, steady, constant, and `eil'ective than can be accomplished without the extension ofthe said air-tubes into the cold-air chamber. The additional advantage of extending t'he air tubes below the body, and surrounding the ire-pot, is to evenly distribute the air that passes against the outside surface of the fire-pot, and is forced through the alternate spaces between the scid air-tubes; these spaces being so'arr-anged, or of such size, that the air must ll them, thus equally diiusing the'heated air from this portion of the furnace. The pipe E, at its point of junction with the body of the furnace, isprovided with a damper, I. When direct draught is required, this damper should bc open, and the smoke will pass directly through the pipe E to the chimney. By closing the damper I the smoke will lbe caused to descend the driving-due F into a horizontal smoke-Hue, J, arranged as shown in `the drawings, and with which the upright lues H and E communicate/.and through which the smoke will ascend from due J. This horizontal .smoke-flue I is provided with an adjustable door, K, for the purpose of clcaningout the soot that may collect therein, as Well as'to .regulate the inlet .of coldair for the diminishing the draught through the pipe E. The

location of the ilues E F and J and the regulating-damper I, being in close proximity to the fuel supply door,

renders the care and management of the furnace very easyand expeditious. This arrangement of the lines-also secures a complete pressure of the products of combustion to all parts of the furnace.

I claim the arrangement of the combustion-chamber B withits smoke exits E'F and H with respectrto the air-tubes D D, &c., of the furnace, substantially in manner and for the purpose as above described.

I also claim the combination and arrangement of the lines E F and J, and their relative position with respect to the fuel-supply door of the furnace, essentially as set forth and explained.

B. WELLS DUNKLEE.

Witnesses:

G. C. DUNKLEE, Crans Bnnwsrnn, Jr. 

